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About me

I have dedicated my career to helping individuals in crisis. My practice includes criminal defense, family law, juvenile law, and professional licensure defense. I have an established track record of success in each of these practice areas.


Criminal Defense

I aggressively represent my client's interests above all else. My first priority is to educate my clients about all of their options, including the options I recommend against. My second priority is to execute on my client's decisions aggressively to maximize results. Here are some of the types of cases I've handled: 


Arson (first and second degree)

Assault (felony and misdemeanor, domestic violence and street assaults)

Burglary (first and second degree)

Child abuse (physical injury and sexual abuse cases)

Drug crimes (possession, distribution)

Kidnapping (first and second degree)

Property Crimes (felony and misdemeanor theft, identity theft, robbery etc.)

Racketeering (narcotics, counterfeiting, chop-shops)

Rape / Sex Abuse / Sodomy / Coercion (first, second and third degree cases)



Family Law

My first goal in any family law case is to try and find a workable, fair, and peaceful settlement. Along the way I try to minimize transaction costs and control future liabilities by anticipating and addressing problems before they happen. 


Unfortunately there are times when the parties can't or won't engage in good faith negotiations. We lawyers call that a "high-conflict case." In recent years most of my family law cases have been high conflict cases, dealing with issues such as: concealment of income and/or assets; false allegations of parental child abuse; founded allegations of parental child abuse; repeated contempt of court by withholding parenting time; dueling custody modifications; custody battles with parents with severe psychological disturbance, etc.


Consequently I am used to doing business with high-conflict personalities, taking an independent and skeptical look at every situation, and tactfully guiding parties to professional services relevant to their particular situation. I give my clients the tools they need to make the best out of a bad situation. 


Juvenile Law

I practice both juvenile dependency (child welfare) and juvenile delinquency law. I primarily represent parents and grandparents in child welfare cases and I emphasize holding the Department of Human Services accountable. In my opinion it rarely makes sense not to challenge DHS in Court. These are cases I assume to take to trial unless there's some really compelling reason not to. I fight to reunify families and if I can't do that, I fight to preserve parental rights as best I can under the circumstances presented to me. I consider this type of work a moral calling and a public service.


Licensure Defense

Individuals with professional licenses are held to high standards of conduct. When a person with a professional license violates these standards their ability to work and practice their profession is in jeopardy. The potential consequences can be devastating not only to the individual but also to their family. My practice is to help advise my clients about their profession's rules of conduct, bring them into compliance if they've slipped, and help them rehabilitate their standing whenever possible. I have helped clients avoid sanction and preserve their licenses. 



Languages spoken: French

Practice areas


  1. Criminal Defense: 34%
  2. Litigation: 33%
  3. Family: 33%



Retainer (sometimes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

26 total 

Are you an attorney? Endorse this lawyer

  • Anne E Tracey

    I strongly endorse Nicholas Heydenrych. He is a skilled criminal and juvenile law attorney, and a very zealous advocate for his clients. I have known Nick for several years, and he always provides his clients with the highest level of representation.


    Anne Tracey Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Robert D. Olsen

    I have worked with Nick for several years on criminal and family law matters and have found that he is always diligent and aggressive. He is compassionate and understands both the legal and personal aspects of practicing law. I would highly recommend Nick as an attorney for anyone looking for competence and caring.


    Robert Olsen Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Guinn & Heydenrych LLC

4915 SW Griffith Drive
Suite 101
Beaverton, OR, 97005


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Work experience
TitleCompany nameDuration
Managing PartnerGuinn & Heydenrych LLC2010 - Present
AssociateShelley Fuller & Associates2009 - 2010
AssociateHillsboro Law Group, PC (Formerly Known As Garland, Burton, McCaffery, PC)2006 - 2009
Association namePosition nameDuration
Washington County Bar Association - Judicial Selection CommitteeBoard Member2013 - Present
Washington County Bar AssociationBoard Member2009 - Present
Oregon State BarMember2006 - Present
Oregon Criminal Defense Lawyers AssociationMember2006 - Present
Legal cases
Case nameOutcome
In the Marriage of G_____.Success at contested arbitration
State v. A*****Acquittal
State v. P********Dismissed
See all legal cases 
Publication nameTitleDate
Oregon Criminal Defense Lawyers Form BookChapter 6: Mental Health Issues in Criminal Defense2011
School nameMajorDegreeGraduated
College of William and Mary, Marshall-Wythe School of LawLawJD - Juris Doctor2005
Oregon State UniversityPolitical Science and PsychologyN/A2002